#include<stdio.h>
main()
{
	int d;
	printf("enter the student grades in the test:");
    scanf("%lf",&d) ;
    printf("The student grade is");
	if(d>=90&&d<100) printf("A\n");
    else if(d>=80&&d<90) printf("B\n");
		else if(d>=70&&d<80) printf("C\n");
			else if(d>=60&&d<70) printf("D\n");
             else printf("E\n");
   }
